It's proven that you need to give your hair three times the moisture in winter months than you do the rest of the year. Moisture comes in many natural forms. OIl is not moisture. Humectants are moisture, water, honey, glycerin. Try adding honey to either your shampoo or conditioner or both. Clear aloe vera gel is a natural 'smoother' , especially to those who still fry their hair with flat irons. Glycerin, added to conditioner, in small amounts, like 2-3 drops not only works wonders for moisture, it also helps promote shine. Using a daily spritzer of natural products is the best thing to help with static.
4 ounces distilled water
4-6 drops of jojoba oil, or coconut, sweet almond, emu
1 tiny squirt of your favorite conditiner
a few drops of your favorite Essential EO, mine is peppermint
Shake well before spritzing. This can also be used right after washing, helps with tangles.
Also try a dab of condtioner with a drop of oil for those parched ends. Especially after washing.
If your hair is long, try wearing it in some cute up-do's more often. The hair hanging down and rubbing on clothing and such, is a big factor in producing static.